The author discusses how to prevent illegal user from entering the system with the help of integrality rules.

此外，笔者还探讨了利用系统完整性约束来防止非法用户对数据的不合理操作。

youdao

Authentication is an important part in the network security. It can prevent illegal user from accessing network.

身份认证是网络安全技术的一个重要组成部分，它限制非法用户访问网络资源。

youdao

However, since DHCP itself hasn't the ability to control access, illegal user can easily fabricate the IP address.

然而，DHCP由于本身不具有访问控制能力，极易造成IP地址盗用。

youdao

One purpose of the Digital Millennium Copyright Act (DMCA) is to protect the technology of file sharing, and companies that use it, by inventing a theoretical "safe harbor" that shelters all sorts of user-powered platforms from the consequences of illegal actions by the users.

ENGADGET

Mr Warren-Boulton's second broad conclusion is that Microsoft has engaged in a number of illegal, exclusionary practices that make it difficult for other browser developers, and limit user choice.

BBC: USA versus Microsoft: The fifth week